Re: Milano Oil Cooler

["Dean W. Cains" <dwc@domain.elided>]

Hi Zamani and Group:

Water sprayed on your Milano's oil cooler and radiator will certainly 
absorb an amount of heat, but perhaps not for the reason you suspect, and 
perhaps not by as much as you suspect.  Much more heat (i.e. energy) will 
be absorbed as the water changes state from liquid to vapor (i.e. 
evaporation) than will be absorbed as the water changes from cold liquid to 
warm liquid.  And by much more, I'm talking about 540 times more.  If you 
use ice water in your reservoir, the water will be less likely to quickly 
evaporate, and thus will absorb much less heat.  This 'change of state' 
phenomenon is what makes air conditioning and refrigeration possible, and 
also makes those old-fashioned ice and salt ice cream freezers 
work.  (Numbers:  79.7 cal/g will convert ice to water, while 540 cal/g 
will convert water to steam.  Only 1 cal/g is required to raise water temp 
by 1 degree C without the state change.)  Can't say for certain what will 
work best on your Milano, but in theory, I'd vote for the water spray at 
ambient temperature.  Remember that neither the oil cooler nor the radiator 
will likely be operating at above the boiling point of water, so you don't 
want to discourage quick evaporation by icing the water.  Water does 
evaporate at all temperatures, even frozen, because the rate of molecular 
movement at a particular temperature is an average value.  Some molecules 
will always be moving faster or slower than that average (graphed as a 
bell-shaped curve), and those moving faster are the most likely to change 
their state to vapor.

Regards,

Dean W. Cains
dwc@domain.elided

'74 Spider Veloce
Lutz, FL

At 06:22 PM 11/8/2001, you wrote:
>Date: Thu, 8 Nov 2001 13:14:59 -0800 (PST)
>From: Zamani Zambri <zzambrimail@domain.elided>
>Subject: Milano Oil Cooler
>
>Hi,
>
>Well I finally did it, I put in an oil cooler. . .
>
>Next project is to add water spray infront of the oil cooler and
>radiator. I will need windsheild fluid spray pump from a Honda or
>something because they are powerful. Before any lapping sessions I'll
>just fill up the reservoir with ice cold water 8-). . .
>
>Zamani
>'87 Milano 3.0

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